Filled polycarbonate compositions having improved flowability and great rigidity

Abstract

The present invention relates to glass fibre, carbon fibre and/or carbon nanotube reinforced polycarbonate compositions comprising flame retardant, diglycerol monoester and optionally antidripping agent and having high flowability, excellent stiffness and possibly improved flame retardant properties. The present invention further relates to the use of the compositions according to the invention in particular in the manufacture of housing parts in the EE and IT sector, for example for electrical housings/junction boxes or for frames of LCD/LED screens and also for component parts for the manufacture of Ultrabooks.

1 .- 15 . (canceled) 
     
     
         16 . A composition comprising
 A) 20 wt % to 99.0 wt % of an aromatic polycarbonate,   B) 0.0 to 1.0 wt % of at least one flame retardant,   C) 0.5 wt % to 50.0 wt % of at least one glass fibre, one carbon fibre and/or carbon nanotubes,   D) 0.01 wt % to 3.0 wt % of at least one flow auxiliary selected from the group of diglycerol esters,   E) 0.0 wt % to 5.0 wt % of at least one antidripping agent,   F) 0.0 wt % to 1.0 wt % of at least one thermal stabilizer,   G) 0.0 wt % to 10.0 wt % of further additives.   
     
     
         17 . The composition according to  claim 16 , wherein the components A) to G) add up to 100 wt %. 
     
     
         18 . The composition according to  claim 16 , wherein the diglycerol ester content is an ester of formula (I) 
       
         
           
           
               
               
           
         
         where R=COC n H 2n+1  and/or R═COR′, 
         where n is an integer and where R′ is a branched alkyl moiety or a branched or unbranched alkenyl moiety and C n H 2n+1  is an aliphatic, saturated linear alkyl moiety. 
       
     
     
         19 . The composition according to  claim 18 , wherein R=COC n H 2n+1 , where n is an integer from 6-24. 
     
     
         20 . The composition according to  claim 16 , wherein the flame retardant present is an alkali and/or alkaline earth metal salt of an aliphatic/aromatic sulphonic acid or of a sulphonamide. 
     
     
         21 . The composition according to  claim 16 , wherein at least 0.05 wt % of an antidripping agent is present. 
     
     
         22 . The composition according to  claim 16 , comprising glass fibres and from 0.001 to 1.0 wt % of a flame retardant. 
     
     
         23 . The composition according to  claim 16 , wherein glass fibres are present and the glass fibres have a precompounding length of 3 mm to 6 mm. 
     
     
         24 . The composition according to  claim 16 , wherein glass fibres are present and the glass fibres are chopped glass fibres. 
     
     
         25 . The composition according to  claim 16 , wherein glass fibres are present and the glass fibres have a mean fibre diameter of 5 to 25 μm. 
     
     
         26 . The composition according to  claim 16 , wherein the composition has a melt volume flow rate MVR of 7-25 cm 3 /10 min, determined to ISO 1133 (test temperature 300° C., mass 1.2 kg) and the modulus of elasticity, determined to ISO 527, is at least 2700 kg*m −1 *s −2 . 
     
     
         27 . The composition according to  claim 16 , wherein the composition comprises carbon fibres. 
     
     
         28 . A method comprising utilizing the composition according to  claim 16  in the manufacture of thin walled shaped articles 0.1-3 mm in thickness for the electrical/electronics sector or the IT sector with a UL94 V-0 flammability rating at 1.5 mm wall thickness. 
     
     
         29 . A method comprising utilizing the composition according to  claim 16  with a melt volume flow rate MVR of 1-30 cm 3 /10 min, determined to ISO 1133 (test temperature 300° C., mass 1.2 kg) and a Charpy impact strength, determined to DIN EN ISO 179/1 eU at room temperature, of above 35 kJ/m 2  in the manufacture of shaped articles. 
     
     
         30 . A method comprising utilizing a diglycerol ester to improve the flowability of polycarbonate melts. 
     
     
         1 . Composition comprising
 A) 20 wt % to 99.0 wt % of an aromatic polycarbonate,   B) 0.0 to 1.0 wt % of at least one flame retardant,   C) 0.5 wt % to 50.0 wt % of at least one glass fibre, one carbon fibre and/or carbon nanotubes,   D) 0.01 wt % to 3.0 wt % of at least one flow auxiliary selected from the group of diglycerol esters,   E) 0.0 wt % to 5.0 wt % of at least one antidripping agent,   F) 0.0 wt % to 1.0 wt % of at least one thermal stabilizer,   G) 0.0 wt % to 10.0 wt % of further additives.   
     
     
         2 . Composition according to  claim 1 , characterized in that the components A) to G) add up to 100 wt %. 
     
     
         3 . Composition according to  claim 1  or  2 , characterized in that the diglycerol ester content is an ester of formula (I) 
       
         
           
           
               
               
           
         
         where R=COC n H 2n+1  and/or R═COR′, 
         where n is an integer and where R′ is a branched alkyl moiety or a branched or unbranched alkenyl moiety and C n H 2n+1  is an aliphatic, saturated linear alkyl moiety. 
       
     
     
         4 . Composition according to  claim 3 , characterized in that R=COC n H 2n+1 , where n is an integer from 6-24, preferably from 8 to 18, more preferably from 10 to 16 and yet more preferably 12. 
     
     
         5 . Composition according to any preceding claim, characterized in that the flame retardant present is an alkali and/or alkaline earth metal salt of an aliphatic/aromatic sulphonic acid or of a sulphonamide. 
     
     
         6 . Composition according to any preceding claim, characterized in that at least 0.05 wt % of an antidripping agent is present. 
     
     
         7 . Composition according to any preceding claim, comprising glass fibres and from 0.001 to 1.0 wt % of a flame retardant. 
     
     
         8 . Composition according to any preceding claim, characterized in that glass fibres are present and the glass fibres have a precompounding length of 3 mm to 6 mm. 
     
     
         9 . Composition according to any preceding claim, characterized in that glass fibres are present and the glass fibres are chopped glass fibres. 
     
     
         10 . Composition according to any of  claims 1  to  9 , characterized in that glass fibres are present and the glass fibres have a mean fibre diameter of 5 to 25 μm, preferably of 8 to 20 μm and more preferably of 11 to 17 μm. 
     
     
         11 . Composition according to any preceding claim, characterized in that the composition has a melt volume flow rate MVR of 7-25 cm 3 /10 min, determined to ISO 1133 (test temperature 300° C., mass 1.2 kg) and the modulus of elasticity, determined to ISO 527, is at least 2700 kg*m −1 *s −2 . 
     
     
         12 . Composition according to any of  claims 1  to  7 , characterized in that the composition comprises carbon fibres. 
     
     
         13 . Use of a composition according to any of  claims 1  to  12  in the manufacture of thin walled shaped articles 0.1-3 mm in thickness for the electrical/electronics sector or the IT sector with a UL94 V-0 flammability rating at 1.5 mm wall thickness. 
     
     
         14 . Use of the composition according to any of  claims 1  to  12  with a melt volume flow rate MVR of 1-30 cm 3 /10 min, determined to ISO 1133 (test temperature 300° C., mass 1.2 kg) and a Charpy impact strength, determined to DIN EN ISO 179/1 eU at room temperature, of above 35 kJ/m 2  in the manufacture of shaped articles, specifically for component parts for Ultrabooks. 
     
     
         15 . Use of diglycerol esters to improve the flowability of polycarbonate melts.